Steam boiler



g- 30, 1932. l. L.. LANGVAND 1,874,552

STEAM BOILER Filed sep?. 1s, 1928 Fig- Fig-f Patented Aug. 30, 1932 PATENTE OFFICE IVAE I.. LANGVANi), or EAEEEE'EQN, omo, AssIeNoE To THE EAEcoox sa wILcox con- PANY, E BAYONNE, NEW JERSEY, A coRroEATroN or NEW JERSEY STEAM BOILEE Application sied september' 19,1928. Y`se1fiai1sra 506,851.

This invention relates to a water tube boiler in which provision is made for separating steam and water from each other while passing through the circulating tubes.V The invention will be understood from the descrip-` tion ink connection with the accompanying drawing in which Fig. 1 is a'longitudinal section throughan illustrative embodiment of the invention; Fig. 2 is a plan View of the same, and Fig. 3 is a section similar to Fig. 1 showing a modification.

kIn the drawing, reference character 1 indicates a steam and water drum of a water tube boiler of the Babcock & Wilcox type that is connected to the usual downtake headers 2 by means of nipples 3. The downtake headers 2 are connected to the uptake headers 4 by means of a bank of inclined tubes 5. One or more rows of inclined tubes 6 parallel to the tubes connect corresponding downtake and upt-ake headers in the well known manner so that a detailed illustration or description of the Same is not necessary for an understanding of the present invention. An interdeck superheater 7 is located between the tubes 5 and 6 and may be connected to the Vsteam and water drum 1 in the usual manner.

Battles 8 and 9 extending across the tubes 5, direct the hot products of combustion from the furnace across these tubes in a plurality of passes as indicated by the curved arrows.

Rows of circulating tubes 10 connect the upper ends of the uptake headers 4 to a row of vertically disposed separator boxes or headers 11 at points intermediate their ends. The headers 11 are located between the headers 4 and the steam and water drum 1. A roof 12 is located abo-ve the circulating tubes 10. Rows of tubes 13 connect the upper portions of the headers 11 with the steam space of the steam and water drum 1, and rows of tubes 14 connect the lower portion of the headers 11 with the upper portions of the headers 2. The tubes 14 are inclined downwardly to drain water from the headers 11 to the headers 2.

A bathe 15 extends along the upper row of tubes 6 from the superheater 7 to the upper portions of downtake headers 16, the upper ends of which are connected by nipples 17 to the lower ends of the headers'2. vA batlie 18 isi-located along the inner side of the nipples 17.

water passes. through the' upper portions of Y the 'headers 4 into the circulating tubes 10 and-thence into the separator boxes or headers 11, the steam rising to the upper portions of these headers and thence passing through the tubes 13 into thesteain and water drum 1, vwhile the kwater passes to the lower portions of the 'headers 11, and thence through theV tubes 14 into the upper portions of the headers. 2, where it joins water' passing downwardly through the nipples 3 into the headers 2. The hot gases flow, in three passes across the tubes5 and thence across the tubes 14 and 13 into the stack. v f l L In'the modification shown in Fig. 3, the baiilelS is omitted in front of the nipples 17 and the hot gases pass in two passes owing around the upper end of the baiile 8 across thetubes 5-and then-pass out between the nipples 17 i vA baiile 19 is provided to pre-- vent Ikthe hot gases from passing between the headers 11 and steam and water drum 1i This baiiie may be located, for example, either along the upperrow of tubes 14 or below Vthe lower row of these tubes, the latter arrangement being illustrated in Fig. 3.-

1 claim: I f `1. In ai steam boiler, a row of adjacent uptakey headers; a row or' adjacent downtake headers; a bank of steam generating tubes connecting the headers; a cross druml at the downtake header end or" the boiler; a row of upright and independent steam and water separation headers located between the `uptake headers and the drum at a position nearer the drum; connections discharging steam from the top parts of the separation headers into the steam space of the drum; connections discharging water from the lower parts of the separation lieaders into the boiler below its water level; and long circulators extending from'the tops-ofthe uptake headers into' intermediate portions of the separation headersand connected thereto; the circulators,

separation headers, and drum acting to eect a three stage steam and water separation in which a substantial amount of such separation is effected by the circulators before they discharge into the separation headers, said connections being the only discharge connections from the separation headers to the drum and the boiler.

` 2. A cross drum steam boiler of the sec-v tional header type comprising a plurality of adjacent uptake headers, a plurality pfad-- jacent downtake headers, horizontally Vinclined steam generating tubes yconnecting the headers, a plurality of nipples. directly con-l necting the Water space of the drum and the dOWntake headers, a plurality of adjacent and separate upwardly extending` separation headers disposed adjacent the drum and over the generating tubes, steam and water circulatortubes extending horizontally from thev uptake headers for a distance greater than c one half of the horizontal distance between the lu take and downtake headers and connecte to intermediate portions of the separa# tion headers, steam connections between the upper portions of the separation headers and the steam space of the drum, and connections discharging water from the lower parts of 'the separation headers into the boiler below its water level, the circulators being long enough and large enough to eilect a substantial amount of steam and water se aration, said connections being the only 'Scharge connections from the separation headers to the drum and the boiler.'

3. A ,cross-drum steam boiler comprising, in Combination, a single horizontallydisposed steam and-water drum, a row of separate downtake headers connected to thevwater space of the drum, a row of separate uptake headers, steam generating tubes connecting the yrows of headers, a row of independent upright separation headers extendingabove the water level of the drum and located adj acent' the drum, connections discharging steam from the upper parts of the separation head-Y ers into the steam space of `the drum, kwater connections leading downwardly from the lower parts of the separation headers into ,the boiler below its water level, circulators ex-A tending from the upper parts of the uptake headers and `discharging into intermediate partsrof the separation headers, and means maintaining the water connections out 01Ev con-y tact with moving furnace gases, the circu-v lators producing a substantial amount of steam and water separation, said connections being the konly discharge connections from the separation headers to the drumand the boiler.` Y

l 4. Ina steam boiler, a row of adjacent uptake headers; a cross drum actingas a steam and water drum at the downtake head-v er end of theboiler; long circulators leading f from the top portions ,of thevuptake headers Y toward the drum; a row of independent and c drum; and connections discharging the water from ythe lower outlets' of said parts into the Y Vboiler below itswater level; the circulators,

said tubular separation'parts, and the drum acting to effect a three stage steam and water separation inv which a substantial amount of such separation is effected by the circulators before they discharge into the tubular separa# tion parts, said connections being the only discharge connections Vfrom the separation parts tothe drum and the boiler.

. IVAR L. LANGVAND.

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